publication Journal Article 2000 Testing NBUFR and NBAFR classes of life distributions using Kernel methods M.N, Al Graian, . 2000 more of publication Optimal Control of Multi-Item Inventory Model with Natural Deterioration Function by Graian M, Essayed A 2010 Testing Exponrntiality Against NBUFR ( NWUFR) by M.AlGraian, Ahmed H.El-Bassiouny, Ammar M.Sarhan 2004 A Nonparametric Testing of New Better than Used Average Failure Rate class of life distributions by Al-Graian, M.N, Hendi, M. I 2002